I've touched on the fact that Soul Blade (Soul Edge in Japan) became Soul Calibur rather than Soul Blade II and so on, but also I have heard that Namco rarely consider Soul Blade to be a prequel despite the fact that it is one, and tend to not ignore Soul Blade hearsay, but see it as more of background stuff - they have the obvious fact that the Calibur games have most of the Soul Blade cast, and they all have the correct storylines, but they seem to want it to be viewed as Soul Blade is one game, Soul Calibur is another series, featuring most of Soul Blade's cast.
Also, in Soul Calibur, if you complete arcade mode with Maxi (SPOILER)he dies of injuries sustained in the final battle, as well as the fact he used all his energy to fight - and to indicate this, he is unable to finish his usual "Victory Scene", and instead starts to fall, clearly dying. The exact same thing happens with Li Long in Soul Blade. Did Namco want to include a storyline where a character (SPOILER)dies after defeating all enemies, but feel they didn't do the storyline justice with Li Long, so they tried it again? Notice both characters used Nunchaku (and, yes Li Long DID use Nunchaku, despite what the UK version said - "strange weapon he made himself" indeed! )